CN105761681B - Window display method and device of screen - Google Patents
Window display method and device of screen Download PDFInfo
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- CN105761681B CN105761681B CN201410797692.7A CN201410797692A CN105761681B CN 105761681 B CN105761681 B CN 105761681B CN 201410797692 A CN201410797692 A CN 201410797692A CN 105761681 B CN105761681 B CN 105761681B
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- 239000011159 matrix material Substances 0.000 claims abstract description 37
- 238000012545 processing Methods 0.000 claims description 82
- 239000004973 liquid crystal related substance Substances 0.000 claims description 45
- 230000010365 information processing Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 12
- 230000006870 function Effects 0.000 description 10
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- 230000005540 biological transmission Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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Abstract
The invention discloses a window display device of a screen, which comprises a machine core circuit module, an information processing module and a backlight dot matrix module, wherein the machine core circuit module is preset with an image storage space; the image storage space in the core circuit module is used for storing the received information to be displayed, and the core circuit module is used for calculating the display parameters corresponding to each effective window according to the current information storage condition of the image storage space; the information processing module calculates the state value of each LED in the backlight dot matrix module according to the display parameters corresponding to the effective window; and the backlight dot matrix module controls each LED on the backlight dot matrix module to be turned on or turned off according to the state value of each LED in the information processing module. The invention also discloses a window display method of the screen. The invention realizes the adjustment of the output display window according to different inputs so as to meet the optimal display requirements of customers.
Description
Technical field
The present invention relates to field of screen display more particularly to the window display methods and device of a kind of screen.
Background technique
It is future television important development direction that high-resolution and screen, which are shown,.Moreover, resolution ratio is 3840 × 2160
The screen television product of UHDTV1 (4K2K) is quickly grown, and has been the high-end mainstream model of domestic and international TV；Resolution ratio is
The screen television of 7680 × 4320 UHDTV1 (8K4K) is also by mass marketed.But input picture & vision signal is big absolutely at present
Partial signal source resolution ratio is respectively less than 3840 × 2160, therefore needing one kind can be according to different input to output display window
It is adjusted, to meet the window display method of the screen of the best image demand of client.
Summary of the invention
It, can not be according to the letter of different resolution when it is a primary object of the present invention to solve screen in the prior art display
Number input to output display window be adjusted the technical issues of.
To achieve the above object, the present invention provides a kind of window displays of screen, including movement circuit module, letter
Processing module and backlight lattice module are ceased, wherein the movement circuit module presets image storage space, image storage
Access unit address in space is corresponding with the position of effective display pixel point of screen；
The movement circuit module receives information to be shown and is stored in described image memory space, the movement circuit
The module information storage condition current according to described image memory space calculates corresponding display parameters of each valid window and anti-
It feeds message processing module, the information of each display is corresponding with a valid window；
The message processing module calculates each in backlight lattice module according to the corresponding display parameters of the valid window
The state value of each LED calculated is sent to backlight lattice module by the state value of LED；
The backlight lattice module controls lighting or closing for each LED according to the state value of each LED.
Preferably, when the movement circuit module is received from the information to be displayed in multiple channels simultaneously, the machine
Core circuit module obtains the initial address of the corresponding information storage of information to be displayed according to the mark of information to be displayed, and will be to
Display information is successively stored according to initial address to the storage unit of image storage space, until the received information of institute all stores
Into image storage space.
Preferably, the information storage condition includes the initial address and corresponding resolution ratio of each information to be displayed, institute
State movement circuit module to be specifically used for: the initial address of the information based on each display and corresponding resolution ratio calculate each
The display parameters of the corresponding valid window of the information of display, the display parameters include effective the window's position and size.
Preferably, the message processing module is used for: reserving a N*M memory space, wherein N is that backlight dot matrix is horizontal
LED number, M are backlight dot matrix vertical LED number, and the bit address of the memory space corresponds to the LED in the backlight lattice module
Physical coordinates position；It, will be in effective display window according to the display parameters of the effective display window of the liquid crystal display panel of the acquisition
LED state is set as " lighting ", and the LED state outside effective display window is set as " closing "；By the state of set LED
It is empty according to the corresponding storage that the signal processing module setting is written in the LED physical coordinates position in the backlight lattice module
Between.
Preferably, the backlight lattice module includes multiple LED matrixes and multiple constant-current driven chips, and the multiple
Constant-current driven chip is connected by cascade mode.
Preferably, the constant-current driven chip is used to receive the control signal of signal processing module output comprising SI connects
Mouth, CLK interface, LATCH interface, OE interface, the constant-current driven chip are connect under the control signal of CLK interface by SI interface
The state value of the LED of the signal processing module output is received, and transmits it to the perseverance of each LED of the backlight lattice module
In stream driving channel temporary register；Constant-current driven chip is according to the control signal of the LATCH interface, by the state value of LED
It inputs in the driving register of constant-current driven chip；Constant-current driven chip opens constant current according to the control signal of the OE interface
Channel is driven, exports the state value of LED to corresponding LED by corresponding constant current driving channel.
In addition, to achieve the above object, the present invention also provides a kind of window display methods of screen, including following step
It is rapid:
When movement circuit module receives information to be shown, the image storage stored to movement circuit module is corresponded to
In space, wherein the storage address in described image memory space is corresponding with effective display pixel point position of liquid crystal display panel；
It is every to calculate liquid crystal display panel for the movement circuit module information storage condition current according to described image memory space
The corresponding display parameters of a effective display window；
The movement circuit module exports the display parameters of the effective display window of calculated liquid crystal display panel to signal processing
Module；
The signal processing module is calculated according to the display parameters of each effective display window of the liquid crystal display panel of the acquisition
Obtain the state value of each LED in backlight lattice module；
The signal processing module controls backlight lattice mode according to the state value of each LED in the backlight lattice module
Each LED's lighting or closing in block.
Preferably, the information storage condition includes the initial address and corresponding resolution ratio of each information to be displayed, institute
The movement circuit module information storage condition current according to described image memory space is stated, liquid crystal display panel is calculated and each effectively shows
The corresponding display parameters of window include:
The initial address of information of the movement circuit module based on each display and corresponding resolution ratio calculate every
The display parameters of the corresponding valid window of the information of a display, the display parameters include effective the window's position and size.
Preferably, the signal processing module is according to the display parameters of the effective display window of liquid crystal display panel of the acquisition,
It calculates and obtains the state value of LED of screen and include:
A N*M memory space is arranged in the signal processing module, and wherein N is the horizontal LED number in backlight lattice module
Mesh, M are the vertical LED number in backlight lattice module；
The signal processing module will effectively be shown according to the display parameters of the effective display window of liquid crystal display panel of the acquisition
Show that the LED state in window is set as " lighting ", the LED state outside effective display window is set as " closing "；
The signal processing module is by the state of each LED in the backlight lattice module according in backlight lattice module
The corresponding memory space that the signal processing module setting is written in LED physical coordinates position, the bit address of the memory space are corresponding
LED physical coordinates position in backlight lattice module.
Preferably, the signal processing module controls backlight according to the state value of each LED in the backlight lattice module
The display state of each LED includes: in lattice module
The signal processing module is serially defeated by the state value of each LED in the backlight lattice module stored in memory space
Enter the driving chip group in backlight lattice module, the driving chip group in the backlight lattice module includes what cascade system connected
At least one backlight dot matrix driving chip；
The backlight dot matrix driving chip drives corresponding LED to light or close according to the state value of the LED.
To sum up, the window display of screen of the present invention has the following beneficial effects: referring now to the prior art
(1) movement circuit module has the output display window positions and size in arbitrary input source in the present invention
Serial regulation function；In addition, the present invention supports multiple source windows display, and can be overlapped mutually between each display window,
It can be independently in the different physics effective pixel regions of display screen.
(2) message processing module drives backlight according to movement circuit module effective display window calculated in the present invention
LED on lattice module, the LED outside the effective display pixel boundary of closing television, to reach efficiently using on backlight lattice module
LED purpose.The also compatible traditional machine core PWM dimming mode of the present invention and LOCAL-DIMMING dimming mode, and the light modulation
Function can work under BY PASS state.
(3) LED in the present invention on backlight lattice module uses single low-voltage power supply driving method, on backlight lattice module
The supply voltage of LED use Precise spraying (VF+VD), VF is the positive effective conducting voltage of LED, and VD is on backlight lattice module
Constant-current driven chip effective port voltage, advantageously reduce extra energy consumption.
(4) when the constant-current driven chip in the present invention on backlight lattice module drives LED, pulsewidth is encoded using position weight
Modulation system, LED luminance number of greyscale levels can be adjusted between 0~65536, meet image large area algorithm drives backlight
The needs of LED；The hardware structure of message processing module also supports LOCAL DIMMING algorithm data to backlight dot matrix in the present invention
The driving of LED in module；Present invention improves over former LOCAL-DIMING since LED luminance adjustment is discontinuous, caused by LCD
Light leakage phenomena.
(5) current output channels of LED constant-current driver part used herein postpone on and off function, can effectively subtract
Few a large amount of LED open and close brought overshoot amplitude simultaneously, improve system EMI problems.
(6) constant current chip of the present invention is connected with LED matrix by PCB trace, is driven unification design using lamp, is more advantageous to and is
System stability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the window display of screen of the present invention；
Fig. 2 is the image storage space and liquid crystal display panel of movement circuit module in the window display of screen of the present invention
The mapping relations figure of effective display pixel point position；
Fig. 3 is the example of shown multiple effective display windows on screen in the window display of screen of the present invention
Figure；
Fig. 4 is to be stored in the window display of screen of the present invention according to image storage space in movement circuit module
Window information driving screen shows the exemplary diagram of effective display window；
Fig. 5 is LED physical coordinates and liquid crystal display panel on backlight lattice module in the window display of screen of the present invention
Effective display pixel point position mapping relations figure；
Fig. 6 is the exemplary diagram of the effective display window of one shown on screen in the window display of screen of the present invention；
Fig. 7 is the status diagram of LED when effectively display window is shown in Fig. 6 on backlight lattice module；
Fig. 8 is the structural schematic diagram of message processing module in the window display of screen of the present invention；
Fig. 9 is that the constant current in the window display of screen of the present invention in signal processing module and backlight lattice module drives
The attachment structure schematic diagram of chip；
Figure 10 is the driving logic of the constant-current driven chip of backlight lattice module in the window display of screen of the present invention
Block diagram；
Figure 11 is that the LED state in the window display of screen of the present invention on display window and backlight lattice module is set
Timing diagram；
Figure 12 is the flow diagram of the window display method first embodiment of screen of the present invention；
Figure 13 is the flow diagram of the window display method second embodiment of screen of the present invention；
Figure 14 is in the window display method of screen of the present invention, and signal processing module is joined according to the display of effective display window
Number calculates the refinement flow diagram for obtaining the state value of each LED in backlight lattice module；
Figure 15 is in the window display method of screen of the present invention, and signal processing module is according to every in the backlight lattice module
The state value of a LED controls the refinement flow diagram of the display state of each LED in backlight lattice module.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In the present invention, by the way that an image storage space, and the storage of the image storage space is arranged in movement circuit module
Element address is corresponding with the effective display pixel point position of liquid crystal display panel.The image storage space is used to store input letter to be shown
Breath.After movement circuit module receives information to be shown, can according to information storage condition current in the image storage space,
The display parameters for obtaining liquid crystal display panel valid window are calculated, and are sent to message processing module, to control the aobvious of backlight Matrix LED
Show.
As shown in Figure 1, showing the structure of the window display of screen of the present invention.Wherein the window of the screen shows dress
Set may include movement circuit module 110, signal processing module 120 and backlight lattice module 130.Movement circuit module 110 is used for
Receive information to be shown, i.e., the information for needing to be shown on the screen transmitted by signal source transmitting terminal.Moreover, the machine core
Circuit module 110 can mutually be communicated with the signal processing module 120 by USB2.0 interface or other communication interfaces.When
After movement circuit module 110 receives information to be shown, which is handled, such as calculate information to be shown to show
The display parameters of the valid window shown.Then by treated, information is sent to signal processing module to movement circuit module 110
120, while movement circuit module 110 will also generate and control signal, to control the operating mode of the signal processing module 120,
Such as traditional light-modulating mode or LOCAL-DIMMING mode etc..Signal processing module 120 is according to movement circuit module 110
Control, calculate the state value of each LED in backlight lattice module 130, and export to backlight lattice module 130, for backlight
Lattice module 130 drives each LED to be shown.
As shown in Fig. 2, showing the image storage space of movement circuit module in the window display of screen of the present invention
With the mapping relations of the effective display pixel of liquid crystal display panel.The position of the effective display pixel point of the liquid crystal display panel is with effective display area
First, upper left corner pixel be origin (0,0), pixel spacing is that the physical coordinates (X, Y) of step-length indicate.This implementation
In example, the step-length of the pixel spacing is 1, but does not limit 1, or other values.It will setting in movement circuit module 110
One image storage space, the position of access unit address and the effective display pixel point of liquid crystal display panel in the image storage space
It is corresponding.Specifically: the origin is by first storage unit in correspondence image memory space, the then second pixel point of the first row
Second storage unit of correspondence image memory space, the third of the third pixel correspondence image memory space of the first row
Storage unit, and so on, until the position of all effective display pixel points of liquid crystal display panel is corresponded to image storage space
Access unit address.
Information to be shown is stored to image one by one and is deposited after receiving information to be shown by movement circuit module 110
In the storage unit for storing up space.In the present embodiment, the initial address of information storage will be arranged in movement circuit module 110, this
Beginning address can be for 110 default setting of movement circuit module, or user's flexible setting as the case may be.Cause
This, the initial position of the window of display information can be adjusted flexibly by the setting of the initial address.For example, to avoid display from rushing
It is prominent, after movement circuit module 110 receives information to be shown, it can first obtain not stored data in image storage space
An initial address is arranged then according to the storage unit situation of acquired not stored data in storage unit, and by letter to be shown
Breath is successively stored into image storage space according to the initial address.
Screen can support multiple windows while show that movement circuit module 110 can receive the information in multiple channels, and
Each channel is correspondingly arranged on the initial address of information storage, and the information sent from corresponding channel will carry corresponding mark.
The mark of the information based on the received of movement circuit module 110 first obtains rising for the corresponding information storage of mark of the information
Beginning address, then by received information successively stored according to initial address into the storage unit of image storage space, until
The received information of institute is all stored into image storage space.As shown in figure 3, the resolution ratio of the screen is 3840*2160, and should
Screen supports the information of 4 effective display windows to show, i.e., effective display window a, effective display window b, effective display window
C, effective display window d.Information to be shown is all stored to image storage space, and movement circuit module 110 will be according to figure
Current information storage condition in image storage space, calculates the corresponding display parameters of each valid window.The information storage condition
It may include the initial address and corresponding resolution ratio of each information to be displayed.The movement circuit module 120 is specifically used for: being based on
The initial address and corresponding resolution ratio of the information of each display calculate the corresponding valid window of information of each display
Display parameters, the display parameters include effective the window's position and size.For example, the resolution ratio of current information to be shown is
640*480, and initial address is A, then movement circuit module 110 will effectively show picture with the corresponding liquid crystal display panel of the initial address
Vegetarian refreshments is that an apex angle coordinate of valid window calculates the boundary to form the valid window then further according to resolution ratio 640*480
The coordinate of point.It, will be by indicating valid window to angular coordinate in the present embodiment.For example, valid window a is by angular coordinate
(x1a, y1a) and (x2a, y2a) is indicated.Then movement circuit module 110 by the display parameters of valid window (such as effectively
Window to angular coordinate) be sent to message processing module 120.
It is understood that if the effective display window message stored in the image storage space of movement circuit module 110
When breath has overlapping, shown effective display window also will overlapping.As shown in figure 4, the image storage space includes 8294400
Storage unit, it is corresponding with effective display pixel point (3840*2160=8294400) of liquid crystal display panel.And the image stores
There are two effective display window, i.e., effective display window a and effective display window b for storage in space, wherein effective display window a
There is overlapping with storage unit of effective display window b respectively in image storage space.Therefore, 110 basis of movement circuit module
Information storage condition in image storage space calculates the display parameters for obtaining effective display window.Movement circuit module 110 will
After the display parameters are sent to message processing module 120, message processing module 120 then according to the display parameters, controls screen
Valid window a and valid window b are shown simultaneously, and valid window a and valid window b has the part of overlapping.
After message processing module 120 receives the display parameters of the valid window of the transmission of movement circuit module 110, back is calculated
The state value of LED in luminous point array module 130.Specifically: message processing module 120 will reserve one section N*M in its memory
Memory space stores LED state, and wherein N is the horizontal LED number of backlight dot matrix, and M is backlight dot matrix vertical LED number.These are deposited
It stores up space and presses bit addressing, the corresponding backlight Matrix LED physical coordinates position (x, y) of bit address, LED physical coordinates and liquid crystal surface
The effective display pixel point coordinate of plate is using similarly referring to origin and pixel away from step-length expression；Optics and structure design determine every
One LED corresponds to liquid crystal display panel effective pixel area.As shown in figure 5, effective display pixel on the liquid crystal display panel is by 3840
Row, the matrix pixel region that 2160 column are formed, and horizontal LED number is N in backlight lattice module 130, vertical LED number is M,
Therefore, a length of 3840/N, width 2160/M in the corresponding effective display pixel point region each LED.Message processing module 120 is then
According to the display parameters for the valid window that movement circuit module 110 is sent, the pixel of effective display window is corresponded in range
The state of LED be set as " lighting ", in the present embodiment, which is 1；The pixel of effective display window is corresponded into range
The state of outer LED is set as " closing ", and in the present embodiment, which is " 0 ".
As shown in fig. 6, effective display window in the screen is 1, and effective display window to angular coordinate are as follows:
(x1, y1) and (x2, y2).And the corresponding pixel region each LED is X ∈ [(x-1920/N), (x+1920/N)], Y ∈
[(y-1080/M),(y+1080/M)].Therefore, effective display that message processing module 120 is sent according to movement circuit module 110
The display parameters of window calculate the state value of backlight Matrix LED, as shown in table 1 below:
The state value of the corresponding backlight Matrix LED of the effective display window of table 1.
Then, message processing module 120 realizes the shape of each LED by the constant-current driven chip of backlight lattice module 130
State control.It is carried on the back as shown in fig. 7, backlight lattice module 130 is controlled according to the status data of LED each in message processing module 120
Each LED is lighted or is closed on luminous point array module 130, i.e., the LED of effective display window covering is illuminating state, is effectively shown
LED except window is in off state.
Further, since the display parameters of the current display information of liquid crystal display panel, such as resolution ratio can be set in user,
And information itself to be shown has resolution ratio, therefore, movement circuit module 110 is according to information current in image storage space
Storage condition, when calculating the corresponding display parameters of each valid window, or by the corresponding display of valid window calculated
Parameter is sent to before message processing module, if receive setting demand of the user to the resolution ratio of display information, by institute
The valid window of calculating is adjusted correspondingly according to user demand.Specifically: adjust the scaling of effective display window
Effective display window is set to meet actual user to realize the size adjustment of display window with the memory length of image storage space
It needs, the LED backlight region correspondingly lighted also changes.For example, the window that user requires the liquid crystal display panel currently to show
Information format is ultra high-definition format, and resolution ratio is 3840*2160, and the resolution ratio of current window information itself to be shown is
640*480, then movement circuit module 110 will adjust the size of effective display window, such as to be shown according to user's needs
It is inserted into pixel between the pixel of window information, or the storage of each pixel in image storage space to be shown
It is inserted into corresponding storage unit in location, that is, increases the memory length of image storage space to be shown.User requires the liquid crystal surface
The resolution ratio for the window information that plate is currently shown is 640*480, and the resolution ratio of current window information itself to be shown is
3840*2160, then movement circuit module 110 will adjust the size of effective display window, such as will be to be shown according to user's needs
The pixel interval of window information extract, or interval extracts that pixel is corresponding deposits in image storage space to be shown
Storage unit reduces the memory length of image storage space to be shown.
Further, as shown in figure 8, showing the specific structure of signal processing module of the present invention.The signal processing module
120 can include: clock PLL, frequency multiplier, counter, USB2.0 interface, MCU, logical algorithm module and GPIO mouthfuls a large amount of etc..
The signal processing module 120 can support 8 groups of bus outputs, and every group of bus could support up the control of 256 point LED.Certainly, according to
It is actually needed and the richer chip extension output bus of resource can be selected.USB2.0 is movement circuit module 110 and signal processing
The communication control interface of module 120, movement circuit module 110 can then carry out freely the operating mode of signal processing module 120
Switching.
Further, as shown in figure 9, including multiple LED matrixes and multiple constant currents in backlight lattice module 130 of the present invention
Driving chip.Wherein, LED matrix is arranged on pcb board by multiple LED and is formed, and multiple constant-current driven chips pass through cascade side
Formula connection, and the constant-current driven chip and LED matrix will be connected by the cabling on PCB.Since the backlight lattice module 130 is adopted
Unification design is driven with the lamp of LED matrix and constant-current driven chip, is more advantageous to system stability.In the present embodiment, which is driven
Dynamic chip is the serial constant-current driven chip in 16 roads, it may include SI interface, CLK interface, LATCH interface, OE interface can additionally wrap
Include constant flow module.Constant-current driven chip is under the control signal of CLK interface, the signal processing module 130 as described in SI interface
The LED state value of output, and the constant current of its serial transmission to each LED of backlight lattice module 130 driving the temporary of channel is posted
In storage.The state value of LED is inputted constant-current driven chip according to the control signal of the LATCH interface by constant-current driven chip
Driving register in；Constant-current driven chip opens constant current and drives channel, make LED's according to the control signal of the OE interface
State value is exported by corresponding constant current driving channel to corresponding LED.LED matrix uses single LED low-voltage power supply driving method,
Supply voltage selection uses Precise spraying (VF+VD), and wherein VF is the positive effective conducting voltage of LED, and VD is constant-current driven chip
Live end voltage drop, realize high efficiency power driving.Meanwhile the single low-voltage power supply driving method is also beneficial to LED matrix
Unification design is driven with the lamp of constant-current driven chip.
As shown in Figures 10 and 11, firstly, signal processing module 130 is input to perseverance by the port SI of constant-current driven chip
First trigger of driving chip is flowed, which outputs signal to next trigger under the control of CLK interface,
And so on, by serial transmission, under the control of CLK interface, the state value of LED will be sent to backlight by DATA line
In the constant current driving channel temporary register of each LED of lattice module 130.Then the control for passing through LATCH signal, by LED
State value input constant-current driven chip driving register in.Finally, passing through the control of OE (DIM) signal again, constant current is opened
Channel is driven, the state value of LED is exported to corresponding LED by corresponding constant current driving channel, lights or close to control LED
It closes.For the current constant control of output signal in constant-current driven chip, it will also pass through the constant flow module control in a constant-current driven chip
Constant current output processed.The constant current value of constant flow module output can be provided by external constant-current source, can also be by setting in advance in register
It is fixed.
Since the minimum output current width of constant-current driven chip is 20ns, driven by the constant-current driven chip
It is dynamic, it can be achieved that 65536 grades of grayscale drivings, LED luminance can continuous gradation adjustment, meet image large area algorithm drives backlight LED
Needs, improve under original LOCAL-DIMING control due to caused by LED luminance adjustment is discontinuous LCD light leakage it is existing
As.
Further, the current output channels of constant-current driven chip will also be opened and be closed using mutually delay, i.e. constant current drives
Delay a period of time is opened again when the current output channels of chip will be opened under the control of OE signal or constant current drives core
It will be closed delay a period of time when the current output channels of piece will close under the control of OE signal.It can so effectively reduce big
It measures LED and opens and closes brought overshoot amplitude simultaneously, improve system EMI problems.It should be noted that the constant current drives core
The delay of the current output channels of piece is opened and is closed and can be realized by the chip characteristics of the constant-current driven chip.
To sum up, the window display of screen of the present invention has the following beneficial effects: referring now to the prior art
(1) movement circuit module has the output display window positions and size in arbitrary input source in the present invention
Serial regulation function；In addition, the present invention supports multiple source windows display, and can be overlapped mutually between each display window,
It can be independently in the different physics effective pixel regions of display screen.
(2) message processing module drives backlight according to movement circuit module effective display window calculated in the present invention
LED on lattice module, the LED outside the effective display pixel boundary of closing television, to reach efficiently using on backlight lattice module
LED.The also compatible traditional machine core PWM dimming mode of the present invention and LOCAL-DIMMING dimming mode, and the dimming function
It can work under BY PASS state.
(3) LED in the present invention on backlight lattice module uses single low-voltage power supply driving method, on backlight lattice module
The supply voltage of LED use Precise spraying (VF+VD), VF is the positive effective conducting voltage of LED, and VD is on backlight lattice module
Constant-current driven chip effective port voltage, advantageously reduce extra energy consumption.
(4) when the constant-current driven chip in the present invention on backlight lattice module drives LED, pulsewidth is encoded using position weight
Modulation system, LED luminance number of greyscale levels can be adjusted between 0~65536, meet image large area algorithm drives backlight
The needs of LED；The hardware structure of message processing module also supports LOCAL DIMMING algorithm data to backlight dot matrix in the present invention
The driving of LED in module；Present invention improves over former LOCAL-DIMING since LED luminance adjustment is discontinuous, caused by LCD
Light leakage phenomena.
(5) current output channels of LED constant-current driver part used herein postpone on and off function, can effectively subtract
Few a large amount of LED open and close brought overshoot amplitude simultaneously, improve system EMI problems.
(6) constant current chip of the present invention is connected with LED matrix by PCB trace, is driven unification design using lamp, is more advantageous to and is
System stability.
Based on the window display of above-mentioned screen, the invention also provides a kind of window display methods of screen.Such as figure
Shown in 12, the screen window display methods of the present embodiment be can comprise the following steps that
Step S110, it when movement circuit module receives information to be shown, is corresponded to and is stored to movement circuit module
Image storage space in, wherein effective display pixel point of the storage address in described image memory space and liquid crystal display panel
Set correspondence；
Step S120, the described movement circuit module information storage condition current according to described image memory space calculates
Obtain liquid crystal display panel each corresponding display parameters of effective display window；
Step S130, the described movement circuit module exports the display parameters of the effective display window of liquid crystal display panel calculated
To signal processing module；
Step S140, the described signal processing module according to the display parameters of each effective display window of the liquid crystal display panel,
Calculate the state value for obtaining each LED in backlight lattice module；
Step S150, state value of the described signal processing module according to each LED in the backlight lattice module, control back
Each LED is lighted or is closed in luminous point array module.
One image storage space, the ground of the storage unit in the image storage space will be set in movement circuit module 110
Location is corresponding with the position of the effective display pixel point of liquid crystal display panel.The image storage space is for receiving transmitted by signal source transmitting terminal
The information for needing to be shown on the screen, information to be shown is stored one by one to the storage unit of image storage space
In.In the present embodiment, the initial address of information storage will be arranged in movement circuit module 110, which can be machine core
110 default setting of circuit module, or user as the case may be and flexible setting.Therefore, pass through the starting point
The initial position of the window of display information can be adjusted flexibly in the setting of location.
When received information is stored into image storage space, movement circuit module 110 will be deposited according to image
The information storage condition in space is stored up, the corresponding display parameters of each valid window are calculated.The information storage condition may include every
The initial address of a information to be displayed and corresponding resolution ratio.Step S120 is specifically included: the information based on each display
Initial address and corresponding resolution ratio calculate each display the corresponding valid window of information display parameters, display ginseng
Number includes effective the window's position and size.For example, the resolution ratio of current information to be shown is 640*480, and initial address is
A, then movement circuit module 110 will be using the effective display pixel point of the corresponding liquid crystal display panel of the initial address as a top of valid window
Angular coordinate calculates the coordinate to form the boundary point of the valid window then further according to resolution ratio 640*480.In the present embodiment,
It will be by indicating valid window to angular coordinate.Then movement circuit module 110 by the display parameters of valid window (such as effectively
Window to angular coordinate) be sent to message processing module 120.
After message processing module 120 receives the display parameters of the valid window of the transmission of movement circuit module 110, it will calculate
The state value of LED in backlight lattice module 130.Then message processing module 120 is driven by the constant current of backlight lattice module 130
Chip realizes the state control of each LED.
Further, as shown in figure 13, before above-mentioned steps S130 further include:
Step S160, the described movement circuit module 110 adjusts the size of effective display window according to user demand.
Since the display parameters of the current display information of liquid crystal display panel, such as resolution ratio can be set in user, and it is to be shown
Information itself there is resolution ratio, therefore, movement circuit module 110 stores feelings according to current information in image storage space
Condition when calculating the corresponding display parameters of each valid window, or is sent out by the corresponding display parameters of valid window calculated
Before giving message processing module 120, if receive setting demand of the user to the resolution ratio of display information, it will be calculated
Valid window be adjusted correspondingly according to user demand.Specifically: adjust the scaling and figure of effective display window
The memory length of image storage space makes effective display window meet actual user's needs to realize the size adjustment of display window,
The LED backlight region correspondingly lighted also changes.For example, the window information lattice that user requires the liquid crystal display panel currently to show
Formula is high-definition format, and resolution ratio is 3840*2160.And the resolution ratio of current window information itself to be shown is 640*480,
Then movement circuit module 110 will adjust the size of effective display window, such as in window information to be shown according to user's needs
Pixel between be inserted into pixel, or be inserted into the storage address of each pixel in image storage space to be shown
Corresponding storage unit increases the memory length of image storage space to be shown.User requires the liquid crystal display panel currently to show
The resolution ratio of the window information shown is 640*480, and the resolution ratio of current window information itself to be shown is 3840*2160,
Then movement circuit module 110 will adjust the size of effective display window according to user's needs, such as by window information to be shown
Pixel interval extract, or the corresponding storage unit of pixel is extracted at interval in image storage space to be shown, i.e.,
Reduce the memory length of image storage space to be shown.
Further, as shown in figure 14, above-mentioned steps S140 can include:
Step S141, a N*M memory space is arranged in the described signal processing module 120, and wherein N is backlight lattice module
Horizontal LED number in 130, M are the vertical LED number in backlight lattice module 130；
Step S142, the described signal processing module 120 is according to the display of the effective display window of liquid crystal display panel of the acquisition
The LED state in effective display window is set " lighting " by parameter, and the LED state outside effective display window is set as " closing
It closes "；
Step S143, the described signal processing module 120 by the state of each LED in the backlight lattice module 130 according to
The corresponding memory space that the signal processing module 120 is written and is arranged in LED physical coordinates position in backlight lattice module 130,
The bit address of the memory space corresponds to the LED physical coordinates position in backlight lattice module 130.
Message processing module 120 will reserve one section of N*M memory spaces storage LED state in its memory, and wherein N is
The horizontal LED number of backlight dot matrix, M are backlight dot matrix vertical LED number.These memory spaces press bit addressing, bit address corresponding one
A backlight Matrix LED physical coordinates position (x, y), LED physical coordinates and the effective display pixel point coordinate of liquid crystal display panel are using same
The reference origin and pixel of sample are indicated away from step-length；Optics and structure design determine that each LED corresponds to the effective picture of liquid crystal display panel
Plain region.As shown in figure 5, effective display pixel on the liquid crystal display panel is the matrix pixel area formed by 3840 rows, 2160 column
Domain, and horizontal LED number is N in backlight lattice module 130, vertical LED number is M, and therefore, each LED is corresponding effectively aobvious
Show a length of 3840/N in pixel region, width 2160/M.Message processing module 120 is then sent according to movement circuit module 110
Valid window display parameters, the state that the pixel of effective display window is corresponded to the LED in range is set as " lighting ",
In the present embodiment, which is 1；The state that the pixel of effective display window is corresponded to the LED outside range is set as " closing
Close ", in the present embodiment, which is " 0 ".
Further, as shown in figure 15, above-mentioned steps S150 can include:
Step S151, the described signal processing module 120 will be each in the backlight lattice module 130 stored in memory space
Driving chip group in the state value serial input backlight lattice module 130 of LED, the driving in the backlight lattice module 130
Chipset includes at least one backlight dot matrix driving chip of cascade system connection；
Step S152, the described backlight dot matrix driving chip drives corresponding LED to light or close according to the state value of the LED
It closes.
Firstly, signal processing module 130 is input to the first of constant-current driven chip by the port SI of constant-current driven chip
A trigger, the trigger output signal to next trigger under the control of CLK interface, and so on, by serial
Transmission, under the control of CLK interface, the state value of LED will be sent to each of backlight lattice module 130 by DATA line
In the constant current driving channel temporary register of LED.Then the state value input constant current of LED is driven in the control for passing through LATCH signal
In the driving register of dynamic chip.Finally, passing through the control of OE (DIM) signal again, opens constant current and drive channel, make the shape of LED
State value is exported by corresponding constant current driving channel to corresponding LED, to control the on and off of LED.For constant current driving
The current constant control of output signal in chip will also control constant current output by the constant flow module in a constant-current driven chip.The perseverance
The constant current value of flow module output can be provided by external constant-current source, can also be by presetting in register.
Since the minimum current width of constant-current driven chip is 20ns, driven by the constant-current driven chip,
Can be achieved the driving of 65536 grades of grayscale, LED luminance can continuous gradation adjustment, meet the need of image large area algorithm drives backlight LED
It wants, improves LCD light leakage phenomena caused by adjusting discontinuously under original LOCAL-DIMING control due to LED luminance.
To sum up, the window display mode of screen of the present invention has the following beneficial effects: referring now to the prior art
(1) movement circuit module has the output display window positions and size in arbitrary input source in the present invention
Serial regulation function；In addition, the present invention supports multiple source windows display, and can be overlapped mutually between each display window,
It can be independently in the different physics effective pixel regions of display screen.
(2) message processing module drives backlight according to movement circuit module effective display window calculated in the present invention
LED on lattice module, the LED outside the effective display pixel boundary of closing television, to reach efficiently using on backlight lattice module
LED purpose.The also compatible traditional machine core PWM dimming mode of the present invention and LOCAL-DIMMING dimming mode, and the tune
Light function can work under BY PASS state.
(3) LED in the present invention on backlight lattice module uses single low-voltage power supply driving method, on backlight lattice module
The supply voltage of LED use Precise spraying (VF+VD), VF is the positive effective conducting voltage of LED, and VD is on backlight lattice module
Constant-current driven chip effective port voltage, advantageously reduce extra energy consumption.
(4) when the constant-current driven chip in the present invention on backlight lattice module drives LED, pulsewidth is encoded using position weight
Modulation system, LED luminance number of greyscale levels can be adjusted between 0~65536, meet image large area algorithm drives backlight
The needs of LED；The hardware structure of message processing module also supports LOCAL DIMMING algorithm data to backlight dot matrix in the present invention
The driving of LED in module；Present invention improves over former LOCAL-DIMING since LED luminance adjustment is discontinuous, caused by LCD
Light leakage phenomena.
(5) current output channels of LED constant-current driver part used herein postpone on and off function, can effectively subtract
Few a large amount of LED open and close brought overshoot amplitude simultaneously, improve system EMI problems.
(6) constant current chip of the present invention is connected with LED matrix by PCB trace, is driven unification design using lamp, is more advantageous to and is
System stability.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (9)
1. a kind of window display of screen, which is characterized in that the window display of the screen includes movement circuit mould
Block, message processing module and backlight lattice module, wherein the movement circuit module presets image storage space, the image
Access unit address in memory space is corresponding with the position of effective display pixel point of screen；
The movement circuit module receives information to be shown and is stored in described image memory space, the movement circuit module
According to the current information storage condition of described image memory space, calculates the corresponding display parameters of each valid window and feed back to
Message processing module, the information of each display are corresponding with a valid window；
When the movement circuit module is received from the information to be displayed in multiple channels simultaneously, the movement circuit module according to
The mark of information to be displayed, obtains the initial address of information to be displayed corresponding information storage, and by information to be displayed according to
Beginning address is successively stored to the storage unit of image storage space, until the received information of institute is all stored to image storage space
In, and multiple windows of the screen are shown simultaneously；
The message processing module calculates each LED in backlight lattice module according to the corresponding display parameters of the valid window
State value, the state value of each LED calculated is sent to backlight lattice module；
The backlight lattice module controls lighting or closing for each LED according to the state value of each LED.
2. the window display of screen as described in claim 1, which is characterized in that the information storage condition includes each
The initial address of information to be displayed and corresponding resolution ratio, the movement circuit module are specifically used for: being based on each display
Information initial address and corresponding resolution ratio calculate each display the corresponding valid window of information display parameters, it is described
Display parameters include effective the window's position and size.
3. the window display of screen as claimed in claim 1 or 2, which is characterized in that the message processing module is used for:
A N*M memory space is reserved, wherein N is the horizontal LED number of backlight dot matrix, and M is backlight dot matrix vertical LED number, the storage
The bit address in space corresponds to the LED physical coordinates position in the backlight lattice module；Had according to the liquid crystal display panel of the acquisition
The display parameters for imitating display window, set " lighting " for the LED state in effective display window, will be outside effective display window
LED state is set as " closing "；By the state of set LED according to the LED physical coordinates position in the backlight lattice module
Set the corresponding memory space that the signal processing module setting is written.
4. the window display of screen as described in claim 1, which is characterized in that the backlight lattice module includes multiple
LED matrix and multiple constant-current driven chips, and the multiple constant-current driven chip is connected by cascade mode.
5. the window display of screen as claimed in claim 4, which is characterized in that the constant-current driven chip is for receiving
The control signal of signal processing module output comprising SI interface, CLK interface, LATCH interface, OE interface, the constant current driving
Chip is under the control signal of CLK interface, the state value of the LED of the output of the signal processing module as described in SI interface, and will
In the constant current driving channel temporary register of its each LED for being transmitted to the backlight lattice module；Constant-current driven chip according to
The control signal of the LATCH interface, will be in the driving register of the state value input constant-current driven chip of LED；Constant current driving
Chip opens constant current and drives channel according to the control signal of the OE interface, drives the state value of LED by corresponding constant current logical
Road is exported to corresponding LED.
6. a kind of window display method of screen, which is characterized in that the window display method of the screen the following steps are included:
When movement circuit module receives information to be shown, the image storage space stored to movement circuit module is corresponded to
In, wherein the storage address in described image memory space is corresponding with effective display pixel point position of liquid crystal display panel；
The movement circuit module information storage condition current according to described image memory space, calculating liquid crystal display panel each has
Imitate the corresponding display parameters of display window；
The movement circuit module exports the display parameters of the effective display window of liquid crystal display panel calculated to signal processing mould
Block；
When the movement circuit module is received from the information to be displayed in multiple channels simultaneously, the movement circuit module according to
The mark of information to be displayed, obtains the initial address of information to be displayed corresponding information storage, and by information to be displayed according to
Beginning address is successively stored to the storage unit of image storage space, until the received information of institute is all stored to image storage space
In, and multiple windows of the screen are shown simultaneously；
The signal processing module calculates according to the display parameters of each effective display window of the liquid crystal display panel and obtains backlight point
The state value of each LED in array module；
The signal processing module controls in backlight lattice module according to the state value of each LED in the backlight lattice module
Each LED's lighting or closing.
7. the window display method of screen as claimed in claim 6, which is characterized in that the information storage condition includes each
The initial address of information to be displayed and corresponding resolution ratio, the movement circuit module are according to described image memory space current
Information storage condition, calculating liquid crystal display panel, each the corresponding display parameters of effective display window include:
The initial address of information of the movement circuit module based on each display and corresponding resolution ratio calculate each aobvious
The display parameters of the corresponding valid window of the information shown, the display parameters include effective the window's position and size.
8. the window display method of screen as claimed in claims 6 or 7, which is characterized in that the signal processing module according to
The display parameters of the effective display window of the liquid crystal display panel of the acquisition, the state value for calculating the LED of acquisition screen include:
A N*M memory space is arranged in the signal processing module, and wherein N is the horizontal LED number in backlight lattice module, M
For the vertical LED number in backlight lattice module；
The signal processing module is according to the display parameters of the effective display window of liquid crystal display panel of the acquisition, by effective display window
LED state in mouthful is set as " lighting ", and the LED state outside effective display window is set as " closing "；
The signal processing module is by the state of each LED in the backlight lattice module according to the LED in backlight lattice module
The corresponding memory space that the signal processing module setting is written in physical coordinates position, the bit address of the memory space correspond to backlight
LED physical coordinates position in lattice module.
9. the window display method of screen as claimed in claim 7, which is characterized in that the signal processing module is according to
The state value of each LED in backlight lattice module, the display state for controlling each LED in backlight lattice module include:
The signal processing module carries on the back the state value serial input of each LED in the backlight lattice module stored in memory space
Driving chip group in luminous point array module, the driving chip group in the backlight lattice module include cascade system connection at least
One backlight dot matrix driving chip；
The backlight dot matrix driving chip drives corresponding LED to light or close according to the state value of the LED.
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| CN201410797692.7A CN105761681B (en) | 2014-12-18 | 2014-12-18 | Window display method and device of screen |
| PCT/CN2014/094635 WO2016095246A1 (en) | 2014-12-18 | 2014-12-23 | Method and device for displaying window of screen |
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| CN108806613B (en) * | 2018-04-13 | 2020-04-28 | 江苏鼎云信息科技有限公司 | Screen cascade-based screen refreshing frame rate improving system and method |
| CN109410864A (en) * | 2018-12-04 | 2019-03-01 | 惠科股份有限公司 | Driving method and driving module of display panel and display device |
| CN110430431B (en) | 2019-06-25 | 2021-10-22 | 浙江大华技术股份有限公司 | Video decoding method, chip, device, computer equipment and storage medium |
| CN110619854B (en) * | 2019-09-24 | 2021-01-05 | 厦门天马微电子有限公司 | Brightness adjusting method of display module and display device |
| CN111045622B (en) * | 2019-11-21 | 2023-06-30 | 中国航空工业集团公司西安航空计算技术研究所 | Object-oriented display control interface model |
| CN111179816B (en) * | 2020-01-09 | 2021-07-06 | Tcl华星光电技术有限公司 | Backlight driving method, backlight driving circuit and backlight driving device |
| CN113539193B (en) * | 2020-04-22 | 2023-01-31 | 大富科技(安徽)股份有限公司 | Liquid crystal display control method and device and computer readable storage medium |
| CN111601430B (en) * | 2020-06-15 | 2022-09-09 | 深圳市美矽微半导体有限公司 | LED drive control method and device |
| CN112698804B (en) * | 2020-12-30 | 2024-06-04 | 深圳Tcl数字技术有限公司 | Data display method, device, equipment and computer readable storage medium |
| CN115966168A (en) * | 2023-01-10 | 2023-04-14 | 深圳国冶星光电科技股份有限公司 | Integrated gradual change formula LED driven display module that goes on and off |
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| CN1713692A (en) * | 2005-07-15 | 2005-12-28 | 天津大学 | Scanning synchronous method and synchronizer based on double-interface RAM buffer memory |
| JP4605675B2 (en) * | 2008-04-01 | 2011-01-05 | 隆敏 柳瀬 | Display system, display method, program, and recording medium |
| CN201383314Y (en) * | 2008-12-22 | 2010-01-13 | 康佳集团股份有限公司 | Video display configuration device and video capturing equipment of LED display screen |
| WO2011021663A1 (en) * | 2009-08-21 | 2011-02-24 | シャープ株式会社 | Liquid crystal display device |
| CN103165083B (en) * | 2013-03-07 | 2015-07-15 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) backlight drive circuit, liquid crystal display device and drive circuit |
| CN203520836U (en) * | 2013-10-16 | 2014-04-02 | 深圳Tcl新技术有限公司 | Backlight driving circuit and liquid crystal display device |
| CN103915072B (en) * | 2014-03-24 | 2016-07-06 | 京东方科技集团股份有限公司 | A kind of display system and driving method thereof |
| CN104093058A (en) * | 2014-06-27 | 2014-10-08 | 张�林 | Multi-window display system of flat-panel display screen and smart television |
| CN104102495B (en) * | 2014-07-31 | 2017-11-07 | 广州华多网络科技有限公司 | A kind of window display method and device |
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